[PATCH 0/3] raid: remove obsolete MMX optimized code

[Eric Biggers]

This series retires 32-bit MMX optimizations for RAID.

Affected CPUs, such as the Pentium MMX and Pentium II, will just fall
back to the existing well-tested scalar code instead.

This was the only remaining MMX optimized code in the kernel.  MMX
optimizations for the much more commonly called functions memcpy(),
copy_page(), and clear_page() were already removed years ago by commit
c6dbd3e5e69c ("x86/mmx_32: Remove X86_USE_3DNOW").  There are zero MMX
optimizations for anything else, like crypto or CRC, which left the RAID
code as an outlier.

Patch 3 also cleans up the CPU feature checks in the RAID6 code.

Eric Biggers (3):
  xor: remove MMX optimized code
  raid6: remove MMX optimized code
  raid6: simplify CPU feature checks

 lib/raid/raid6/Makefile      |   4 -
 lib/raid/raid6/x86/mmx.c     | 118 --------
 lib/raid/raid6/x86/pq_arch.h |  69 +----
 lib/raid/raid6/x86/sse1.c    | 136 ---------
 lib/raid/xor/Makefile        |   2 +-
 lib/raid/xor/x86/xor-mmx.c   | 515 -----------------------------------
 lib/raid/xor/x86/xor_arch.h  |   5 -
 7 files changed, 12 insertions(+), 837 deletions(-)
 delete mode 100644 lib/raid/raid6/x86/mmx.c
 delete mode 100644 lib/raid/raid6/x86/sse1.c
 delete mode 100644 lib/raid/xor/x86/xor-mmx.c


base-commit: 21a7f44fd0765fcc5194130b28767786eba1d1e7
-- 
2.56.0